Manufacturer: Bently Nevada

Part number: 190501-08-99-04

Product type :Velomitor CT Velocity Transducer

Operating Temperature: -40 °C to +85 °C (-40 °F to +185 °F)

Storage Temperature: -40 °C to +100 °C (-40 °F to +212 °F)

Shock Limit: 5000 g pk, maximum

Humidity Limit: 100% condensing, non-submerged

Magnetic Field Susceptibility: <0.0068 mm/s/gauss (0.268 mil/s/gauss) @ 50 gauss, 50-60Hz

Sensitivity: 3.94 mV/mm/s (100 mV/in/s) ±5%

Frequency Response:

3.0 Hz to 900 Hz (180 to 54,000 cpm) ±1.0 dB

1.5 Hz to 1.0 kHz (90 to 60,000 cpm) ±3.0 dB

Amplitude Linearity: ±2% to 63.5 mm/s pk (2.5 in/s pk)

Mounted Resonant Frequency: 9 kHz, minimum (stud mounted, except quick disconnect)

Output Bias Voltage: 10.1 Vdc ± 1.0 Vdc, Pin A referenced to Pin B

Dynamic Output Impedance: <400 Ω typical

Weight: <297 g (10.5 oz.), typical

Mounting Surface: 33 mm diameter (1.3 in diameter)

Height: 82 mm (3.2 in)

Case Material: 316L stainless steel

The Velomitor CT Velocity Transducer is a low-frequency version of our standard Velomitor Piezo-velocity Sensor.  Its design specifically measures casing vibration velocity on cooling tower and air-cooled heat-exchanger fan assemblies that operate at or above 90 rpm (100 to 300 rpm typical). 

The Velomitor CT Transducer can measure vibration amplitudes at these frequencies as well as the vibration frequencies generated by the fan motor and speed reducer.

If you are measuring a machine housing to determine where to install transducers, consider what kinds of data you need to obtain. Most common machine malfunctions (imbalance, misalignment, and so forth) originate at the rotor and cause a change in rotor vibration. The location you select on the housing must accurately conduct rotor vibration to the transducer.

Install the transducer carefully. If you don't, the transducer may not accurately detect vibrations and can transmit invalid data. Bently Nevada provides engineering services to accurately measure machine housings and to install transducers.

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